Macher



UNI E STATES PATENT OFFICE.

JOHANNES O. SGHUHMAGHER, OF BLASEWITZ, NEAR DRESDEN, SAXONY,

GERMANY, 'ASSIGNOR TO FREDERIG W. MATHIAS, OF ST. LOUIS, MO.

IMPROVEMENT IN PROCESSES OF COLORING PHOTOGRAPHS.

Specification forming part of Letters Patent No. 214,008, dated April 8, 1879; application filed May 28, 1877.

To all whom it may concern.-

Be it known thatI, J OHANNES CARL Somm- MACHER, of Blasewitz, near Dresden, in the Kingdom of Saxony and Empire of Germany, have invented an Improved Process for Coloring Photographs, &c., of which the following is a specification.

This invention relates to an improvement in the art of coloring photographs and like pictures. a a

I prefer to call my improvement the Poikilo process.

The object of this invention is to accomplish coloring, tinting, and painting the photograph with greater artistic skill, finish, and beauty.

lowing manner:'

I take the photograph or picture to be colored and apply on its back a coating of. some fine clear varnish-copal, lac, or other. When perfectly dry the same side of the picture has applied to it a further coating of Frenchretouching-varnish, the application of both kinds of varnish being tocause the picture to become clear and perfectly transparent. The picture thus madetransparcnt is exposed to the light, in order to apply the oil colors or paints. I,

It will here be noted that, owing to the transparent effect, the photograph is in a condition to better enable the artist to apply the coloring. Specially, the colors can be applied with greater dispatch and accuracy to produce a more'faithful portrayal or imitation than has heretofore been done. The photograph-or pictureremains unchanged by this process, and hence the artist or operator is guided in his work to produce a natural colored or painted reproduction. After the paints or colors become dry, a coating, of the copal, or dammar, or other arnish is reapplied.

I carryout my improved process in the fol- I further prepare a paste, consisting of ingredients that do not despoil the clearness or transparency of the picture, said paste being composed as follows: I take of starch, ten parts; of white glue, two parts; and of Venetian turpentine, one part, and mix all together to such a consistency as to flow with or foll w the brush.

This paste is for the purpose of mounting the photograph or picture (which has been treated according to my process) upon pasteboard, or carton papo'er, or on white canvas. When mounted, I lastly apply a thin coating of the copal, or dammar, or similar clear varnish on the face side of the colored picture.

I am aware that in the methods heretofore adopted and used to color photographic images the same has been first rendered transparent; secondly, the colors were applied on the back surface; and, lastly, that the colored picture was mounted. Nor do I claim such methods; but

What I do claim is- The process for coloring photographs, consisting in first subjecting the same to the action of copal, lac, and French retouching-varnish, as herein described; next, applying the colors upon the back surface of the image next,mounting same, using the mixture con/sistingof starch, white glue, and Venetian turpentine, as herein described; and, finally, applying a coating of varnish upon the face side of the picture, all substantially as se forth.

In testimony of said invention have hereunto set my hand.

YJOHANNES SGHUHMAGHER.

Witnesses:

CARL RICHARD ROBERT Dnronsnn, FRANZ EMIL Bonnrscn. 

